diff --git a/specification/healthdataaiservices/HealthDataAIServices.Deidentification/examples/2024-01-31-preview/RealtimeOperations_Deid.json b/specification/healthdataaiservices/HealthDataAIServices.Deidentification/examples/2024-01-31-preview/RealtimeOperations_Deid.json
index 9a390544e35c..24c33397af53 100644
--- a/specification/healthdataaiservices/HealthDataAIServices.Deidentification/examples/2024-01-31-preview/RealtimeOperations_Deid.json
+++ b/specification/healthdataaiservices/HealthDataAIServices.Deidentification/examples/2024-01-31-preview/RealtimeOperations_Deid.json
@@ -25,7 +25,8 @@
               "confidenceScore": 0.83
             }
           ],
-          "stringIndexType": "TextElement_v8"
+          "stringIndexType": "TextElement_v8",
+          "etag": "0x000000000000000"
         }
       }
     }
diff --git a/specification/healthdataaiservices/HealthDataAIServices.Deidentification/models.tsp b/specification/healthdataaiservices/HealthDataAIServices.Deidentification/models.tsp
index ab2feef97784..f2d179d3a5ea 100644
--- a/specification/healthdataaiservices/HealthDataAIServices.Deidentification/models.tsp
+++ b/specification/healthdataaiservices/HealthDataAIServices.Deidentification/models.tsp
@@ -14,7 +14,7 @@ model Job {
   @doc("The name of a job.")
   @visibility("read")
   @maxLength(36)
-  @minLength(1)
+  @minLength(3) // Must be 3 to match regex
   @pattern("^[a-zA-Z0-9][a-zA-Z0-9-_]+[a-zA-Z0-9]$")
   @path
   name: string;
@@ -138,11 +138,13 @@ model SourceStorageLocation {
   location: url;
 
   @doc("Prefix to filter blobs by.")
+  @minLength(1)
+  @maxLength(1024)
   prefix: string;
 
   @doc("List of extensions to filter blobs by.")
   @minItems(1)
-  extensions?: Array<string> = ["*"];
+  extensions: Array<string> = ["*"];
 }
 
 @doc("Storage location.")
@@ -151,6 +153,8 @@ model TargetStorageLocation {
   location: url;
 
   @doc("Prefix to filter blobs by.")
+  @minLength(1)
+  @maxLength(1024)
   prefix: string;
 }
 
@@ -189,17 +193,16 @@ enum StringIndexType {
 model DeidRequest {
   @doc("Input text to deidentify.")
   @maxLength(100000) // 100KB
-  @minLength(1)
   inputText: string;
 
   @doc("Data type of the input.")
-  dataType: DocumentDataType;
+  dataType: DocumentDataType = DocumentDataType.PlainText;
 
   @doc("Operation to perform on the input.")
-  operation: OperationType;
+  operation: OperationType = OperationType.Surrogate;
 
   @doc("Requested Encoding of the tag response indices.")
-  stringIndexType?: StringIndexType = StringIndexType.TextElement_v8;
+  stringIndexType: StringIndexType = StringIndexType.TextElement_v8;
 
   @maxLength(16)
   @doc("Format of the redacted output. Only valid when OperationType is Redact.")
@@ -227,8 +230,7 @@ model PhiTaggerResult {
   @maxLength(1024) // Max length for Blob Name
   path?: string;
 
-  @doc("Checksum of the file.")
-  checksum?: string;
+  ...EtagProperty;
 }
 
 @doc("List of PHI Entities.")
diff --git a/specification/healthdataaiservices/data-plane/HealthDataAIServices.Deidentification/preview/2024-01-31-preview/HealthDataAIServices.Deidentification.json b/specification/healthdataaiservices/data-plane/HealthDataAIServices.Deidentification/preview/2024-01-31-preview/HealthDataAIServices.Deidentification.json
index 5939254240b3..77e73cc5239f 100644
--- a/specification/healthdataaiservices/data-plane/HealthDataAIServices.Deidentification/preview/2024-01-31-preview/HealthDataAIServices.Deidentification.json
+++ b/specification/healthdataaiservices/data-plane/HealthDataAIServices.Deidentification/preview/2024-01-31-preview/HealthDataAIServices.Deidentification.json
@@ -169,7 +169,7 @@
             "description": "The name of a job.",
             "required": true,
             "type": "string",
-            "minLength": 1,
+            "minLength": 3,
             "maxLength": 36,
             "pattern": "^[a-zA-Z0-9][a-zA-Z0-9-_]+[a-zA-Z0-9]$"
           },
@@ -224,7 +224,7 @@
             "description": "The name of a job.",
             "required": true,
             "type": "string",
-            "minLength": 1,
+            "minLength": 3,
             "maxLength": 36,
             "pattern": "^[a-zA-Z0-9][a-zA-Z0-9-_]+[a-zA-Z0-9]$"
           },
@@ -312,7 +312,7 @@
             "description": "The name of a job.",
             "required": true,
             "type": "string",
-            "minLength": 1,
+            "minLength": 3,
             "maxLength": 36,
             "pattern": "^[a-zA-Z0-9][a-zA-Z0-9-_]+[a-zA-Z0-9]$"
           },
@@ -366,7 +366,7 @@
             "description": "The name of a job.",
             "required": true,
             "type": "string",
-            "minLength": 1,
+            "minLength": 3,
             "maxLength": 36,
             "pattern": "^[a-zA-Z0-9][a-zA-Z0-9-_]+[a-zA-Z0-9]$"
           },
@@ -423,7 +423,7 @@
             "description": "The name of a job.",
             "required": true,
             "type": "string",
-            "minLength": 1,
+            "minLength": 3,
             "maxLength": 36,
             "pattern": "^[a-zA-Z0-9][a-zA-Z0-9-_]+[a-zA-Z0-9]$"
           },
@@ -590,16 +590,17 @@
         "inputText": {
           "type": "string",
           "description": "Input text to deidentify.",
-          "minLength": 1,
           "maxLength": 100000
         },
         "dataType": {
           "$ref": "#/definitions/DocumentDataType",
-          "description": "Data type of the input."
+          "description": "Data type of the input.",
+          "default": "PlainText"
         },
         "operation": {
           "$ref": "#/definitions/OperationType",
-          "description": "Operation to perform on the input."
+          "description": "Operation to perform on the input.",
+          "default": "Surrogate"
         },
         "stringIndexType": {
           "$ref": "#/definitions/StringIndexType",
@@ -615,7 +616,8 @@
       "required": [
         "inputText",
         "dataType",
-        "operation"
+        "operation",
+        "stringIndexType"
       ]
     },
     "DeidResponse": {
@@ -709,7 +711,7 @@
         "name": {
           "type": "string",
           "description": "The name of a job.",
-          "minLength": 1,
+          "minLength": 3,
           "maxLength": 36,
           "pattern": "^[a-zA-Z0-9][a-zA-Z0-9-_]+[a-zA-Z0-9]$",
           "readOnly": true
@@ -1219,14 +1221,16 @@
           "description": "Path to the file in the storage container.",
           "maxLength": 1024
         },
-        "checksum": {
-          "type": "string",
-          "description": "Checksum of the file."
+        "etag": {
+          "$ref": "#/definitions/Azure.Core.eTag",
+          "description": "The entity tag for this resource.",
+          "readOnly": true
         }
       },
       "required": [
         "entities",
-        "stringIndexType"
+        "stringIndexType",
+        "etag"
       ]
     },
     "SourceStorageLocation": {
@@ -1240,7 +1244,9 @@
         },
         "prefix": {
           "type": "string",
-          "description": "Prefix to filter blobs by."
+          "description": "Prefix to filter blobs by.",
+          "minLength": 1,
+          "maxLength": 1024
         },
         "extensions": {
           "type": "array",
@@ -1256,7 +1262,8 @@
       },
       "required": [
         "location",
-        "prefix"
+        "prefix",
+        "extensions"
       ]
     },
     "StringIndexType": {
@@ -1300,7 +1307,9 @@
         },
         "prefix": {
           "type": "string",
-          "description": "Prefix to filter blobs by."
+          "description": "Prefix to filter blobs by.",
+          "minLength": 1,
+          "maxLength": 1024
         }
       },
       "required": [
diff --git a/specification/healthdataaiservices/data-plane/HealthDataAIServices.Deidentification/preview/2024-01-31-preview/examples/RealtimeOperations_Deid.json b/specification/healthdataaiservices/data-plane/HealthDataAIServices.Deidentification/preview/2024-01-31-preview/examples/RealtimeOperations_Deid.json
index 9a390544e35c..24c33397af53 100644
--- a/specification/healthdataaiservices/data-plane/HealthDataAIServices.Deidentification/preview/2024-01-31-preview/examples/RealtimeOperations_Deid.json
+++ b/specification/healthdataaiservices/data-plane/HealthDataAIServices.Deidentification/preview/2024-01-31-preview/examples/RealtimeOperations_Deid.json
@@ -25,7 +25,8 @@
               "confidenceScore": 0.83
             }
           ],
-          "stringIndexType": "TextElement_v8"
+          "stringIndexType": "TextElement_v8",
+          "etag": "0x000000000000000"
         }
       }
     }